5.3L/4L60E in a 67 C10 issue...PLEASE HELP
#1
5.3L/4L60E in a 67 C10 issue...PLEASE HELP
I put an 08 5.3L and a 4L60E in my 67 C10 pickup. It runs great except for one annoying issue. Sometimes at a constant light throttle the RPM will raise and lower over and over by about 300 RPM and give a bank 1 and 2 lean code (P0171 and P0174). If I let off or get on the throttle the surging stops and it drives normally. I took a freeze frame of when the issue occurs and got the following:
Fuel sys 1 CL
Fuel sys 2 CL
Calc load 74.5%
ECT 92 deg C
STFT B1 1.6%
LTFT B1 29.7%
STFT B2 1.6%
LTFT B2 29.7%
MAP 78 KPA
RPM 1924
Speed 54 Km/H
IAT 45 deg C
MAF 55.39 g/s
TPS 40%
Run time 443 sec
Command Evap 100%
Warm up DTC clear 9
Dist 115 km
CAT1 420 deg C
CAT2 420 deg C
ECU volts 12.6
Load value 54%
EQ ratio .999
Rel TPS 25.5%
Ambient 28 deg C
TPS B 39.6
ACC pedal D 34.5%
ACC pedal E 17.3%
Command TAC 37.3%
Evap up 1875 Pa
Any help would be greatly appreciated. John from Speartech thinks that it may be that I have an E85 tune on a non-E85 engine. Is this a possible reason for this issue?
Fuel sys 1 CL
Fuel sys 2 CL
Calc load 74.5%
ECT 92 deg C
STFT B1 1.6%
LTFT B1 29.7%
STFT B2 1.6%
LTFT B2 29.7%
MAP 78 KPA
RPM 1924
Speed 54 Km/H
IAT 45 deg C
MAF 55.39 g/s
TPS 40%
Run time 443 sec
Command Evap 100%
Warm up DTC clear 9
Dist 115 km
CAT1 420 deg C
CAT2 420 deg C
ECU volts 12.6
Load value 54%
EQ ratio .999
Rel TPS 25.5%
Ambient 28 deg C
TPS B 39.6
ACC pedal D 34.5%
ACC pedal E 17.3%
Command TAC 37.3%
Evap up 1875 Pa
Any help would be greatly appreciated. John from Speartech thinks that it may be that I have an E85 tune on a non-E85 engine. Is this a possible reason for this issue?
#3